GNU libmicrohttpd is a small C library for
embedding HTTP server functionality into other
applications. It is reentrant, fast, supports HTTP
1.1, and permits listening on multiple ports. The
API is simple and still powerful enough to allow
programmers to use the entire HTTP feature set.
SSL/TLS support is available as an option.

Mobile Spy is a phone application that makes it possible to monitor text messages, GPS locations, call details, surrounding sounds and conversations, photos, and social media activity, and view the screen live from anywhere in the world without any indication of connection.

Droper is a Symbian Dropbox client that allows Dropbox users to access and modify their synced files and folders. It can also be used as a light-weight Dropbox client for desktop platforms like Windows and Linux.

FlickrUp is an app that helps with uploading images captured from a mobile device to Flickr using a GPRS or Wi-fi connection. It will prevent users from hassles of transferring images from a mobile to a computer and then uploading them.

Fire is a fast, themable UI toolkit and XHTML/CSS renderer for mobile application and game development. It is an eye-candy alternative to the standard MIDP2 UI components that produces a superior UI result on all mobile devices.

If you have a pre-determined quota from your operator of how much packet data you can use in a month, it's a pain to first find the Logs application, open the packet data counter, then try and work out how much data you have left from the amount used so far. Data Quota shows two simple bars: one showing how much of the data for this month you have used, and one showing how much of the month has elapsed. This lets you tell at a glance if you've been using data up too quickly or slowly, so you can be more (or less) frugal.

Game & Watch Simulator is a generic engine for
simulation of Game & Watch games, starting with
ports of the Madrigal Game & Watch Simulators
(http://www.madrigaldesign.it/sim/). It is
designed to run anywhere SDL is available, with
emphasis on handheld machines.

TotalCross (totally cross-platform) is a mobile development platform for PDAs and smartphones.
It makes it possible to develop portable Java applications that can be deployed on a wide range of smartphones without any adaptation in the source code.

JLearnItME is a multilingual translator for mobile phones. It includes15 languages: English, French, Spanish, Dutch, German, Italian, Hebrew, Portuguese, Swedish, Danish, Norwegian, Hungarian, Russian, Latin and Czech. The same dictionary can translate from any language to any language (e.g. English-French and French-English). It takes only 2.0MB for the 15 languages. It works on any mobile that accepts Java applications larger than 2.0MB. The user interface is available in English, French, Dutch, German, Italian, and Czech. You can create your own dictionary with JLearnIt (e.g. only French - Italian). It browses the nearest words if you do not find a translation.